CN210370815U

CN210370815U - High-pressure cylinder shaft seal gas leakage pipeline

Info

Publication number: CN210370815U
Application number: CN201920638128.9U
Authority: CN
Inventors: 陈飞
Original assignee: Shanghai Feiliang Machinery Manufacturing Co Ltd
Current assignee: Shanghai Feiliang Machinery Manufacturing Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-04-21
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a belong to the technical field of steam turbines, in particular to a high-pressure cylinder shaft seal gas leakage pipeline, which comprises a motor end steam seal baffle, a corrugated pipe, a second 90-degree elbow, an electric regulation end merging pipeline and an output pipe, wherein the right side end of the motor end steam seal baffle is fixedly provided with a valve regulation end steam seal baffle, the left side wall of the valve regulation end steam seal baffle is fixedly provided with the corrugated pipe, the top end of the corrugated pipe is integrally formed with the pipeline, the top end of the pipeline is integrally formed with the first 90-degree elbow, the other end of the first 90-degree elbow is integrally formed with a corrugated pipe rear straight pipe, the left side end of the corrugated pipe rear straight pipe is integrally formed with the second right-angle elbow, the other end of the second right-angle elbow is integrally formed with an electric end manual regulation valve front pipeline, the whole process of the utility model maintains the gas temperature and pressure, and reduces the heat and gas, the leaked gas is recycled, and the heat efficiency of the steam turbine is improved.

Description

High-pressure cylinder shaft seal gas leakage pipeline

Technical Field

The utility model relates to a steam turbine technical field specifically is a high-pressure cylinder shaft seal gas leakage pipeline.

Background

When the steam turbine runs, a proper gap is required to be left between the rotor and the cylinder so as not to collide with each other; however, the existence of the clearance causes steam leakage, which not only reduces the efficiency of the unit, but also influences the safe operation of the unit. In order to reduce the leakage of steam and prevent air from leaking, a sealing device, generally called a steam seal, is needed, and because a steam turbine rotor needs to penetrate out of a cylinder, a certain radial gap needs to be reserved between the rotor and the cylinder, and the steam pressure in the cylinder is unequal to the external atmospheric pressure, high-pressure steam in the steam turbine inevitably leaks out through the gap, so that working medium loss is caused, the operating environment is deteriorated, and a shaft neck or a rushing bearing can be heated to deteriorate lubricating oil; or the external air leaks into the low-pressure end to destroy the vacuum, thereby increasing the load of the steam extraction equipment and reducing the efficiency of the unit. To prevent or reduce this, steam seals are provided at both ends of the rotor through the cylinder, and are called shaft end steam seals, or shaft seals for short.

Although the steam turbine is provided with the shaft end steam seal, the steam leakage phenomenon can be reduced, but the steam leakage cannot be completely eliminated. In order to completely prevent and avoid steam leakage, ensure normal start, stop and operation of a unit, recover the steam leakage and utilize the heat of the steam leakage, and reduce the working medium and heat loss of the system, the steam turbine is provided with a shaft seal system consisting of a shaft end steam seal, a pipeline, a valve and accessory equipment which are connected with the shaft end steam seal. The modern large-scale unit shaft seal system is a closed shaft seal system which consists of a shaft end steam seal, a shaft seal steam supply main pipe pressure adjusting mechanism, a shaft seal cooler, a desuperheater and related pipelines.

The shaft seal end of the steam turbine can not be fully utilized and leaked due to the fact that internal steam can not be fully utilized, the requirement can not be met due to a space limiting structure or the requirement for sealing can not be met due to the use time of the shaft seal tooth during design, and the like. Cause the gas leakage, make the gas that leaks unable used, lead to the thermal efficiency to reduce, the energy that the output was the same in unit interval is more, is unfavorable for realizing vapour cyclic utilization, consequently needs a high-pressure cylinder shaft seal gas leakage pipeline of research and development urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-pressure cylinder shaft seal gas leakage pipeline to keep whole in-process gas temperature and pressure, reduce the heat and the air current loss of unit, the gas cyclic utilization that will spill has improved the thermal efficiency of steam turbine.

In order to achieve the above object, the utility model provides a following technical scheme: a high-pressure cylinder shaft seal air leakage pipeline comprises a motor end steam seal baffle, a corrugated pipe, a second 90-degree elbow, an electric regulation end combining pipeline and an output pipe, wherein the right side end of the motor end steam seal baffle is fixedly provided with a valve regulation end steam seal baffle, the left side wall of the valve regulation end steam seal baffle is fixedly provided with the corrugated pipe, the top end of the corrugated pipe is integrally formed with the pipeline, the top end of the pipeline is integrally formed with a first 90-degree elbow, the other end of the first 90-degree elbow is integrally formed with a corrugated pipe rear straight pipe, the left side end of the corrugated pipe rear straight pipe is integrally formed with a second right-angled elbow, the other end of the second right-angled elbow is integrally formed with an electric end manual regulating valve front pipeline, the bottom end of the electric end manual regulating valve front pipeline is fixedly provided with an electric end manual regulating valve, the bottom of the electric end manual regulating valve is fixedly provided with an electric end manual regulating valve, the bottom end of the straight pipe behind the electric end manual regulating valve is fixedly provided with an electric end manual regulating valve straight pipe rear tee joint, the bottom of the electric end manual regulating valve straight pipe rear tee joint is fixedly provided with the electric regulating end combining pipeline, the right side wall of the regulating end steam seal baffle is fixedly provided with a second corrugated pipe, the top of the second corrugated pipe is fixedly provided with a second 90-degree elbow, the other end of the second 90-degree elbow is integrally formed with a regulating end straight pipe, the other end of the regulating end straight pipe is integrally formed with a third right-angle elbow, the bottom end of the third right-angle elbow is integrally formed with a regulating end manual regulating valve front pipeline, the bottom of the regulating end manual regulating valve front pipeline is fixedly provided with a regulating end manual regulating valve, the bottom of the regulating end manual regulating valve is fixedly provided with a regulating valve end manual regulating valve lower pipeline, the bottom end of the regulating valve end manual regulating valve lower pipeline is fixedly provided with a rear pipeline contraction joint, the bottom fixed mounting of back pipeline shrinkage joint has fourth elbow bend, fourth elbow bend integrated into one piece the electricity accent end merges the pipeline, the left side end integrated into one piece that the electricity accent end merges the pipeline has fifth elbow bend, the bottom integrated into one piece of fifth elbow bend has the electricity to transfer the straight tube that bends down of gathering, the electricity is transferred the bottom fixed mounting who gathers the straight tube that bends down and is had the constant diameter tee bend, the bottom fixed mounting of constant diameter tee bend the output tube, both sides wall difference fixed mounting has manual control valve and spiale to seal overflow pneumatic control valve around the output tube, spiale seals overflow pneumatic control valve's back lateral wall fixed mounting has the spiale to seal the overflow pipeline, manual control valve's preceding lateral wall fixed mounting spiale seals the female pipeline of return steam.

Preferably, a flowmeter is fixedly mounted on the left side of the electrically-adjusted end combining pipeline, and a battery is arranged in the flowmeter.

Preferably, the spindle seal steam return main pipe pipeline is fixedly installed with the overflow pipeline, and the spindle seal overflow pipeline is fixedly installed with the gas condensation pipeline.

Preferably, the electric end manual regulating valve, the valve adjusting end manual regulating valve, the spindle seal overflow pneumatic regulating valve and the manual regulating valve are all switch channels for regulating flow.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a high-pressure cylinder shaft seal gas leakage pipeline, cooperate the gas of revealing to the clearance between rotor and the gland ring with the bearing seal tooth on motor end gland baffle and the transfer valve end gland baffle, use the gas that the clearance between rotor and the gland ring was revealed in the gland chamber between motor end gland baffle and the transfer valve end gland baffle was collected to the motor end gland baffle, the gas of will collecting through built-in pipeline draws forth, finally insert bearing seal heating end and low pressure gas end with gas through the pipeline of being connected on with motor end gland baffle and the transfer valve end gland baffle, whole process has kept gas temperature and pressure, the heat and the air loss of unit have been reduced, the gas circulation who will spill utilizes, the thermal efficiency of steam turbine has been improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a right side schematic view of the structure of the present invention.

In the figure: 100 motor end steam seal baffle, 110 valve end steam seal baffle, 200 corrugated pipe, 210 pipeline, 220 corrugated pipe rear straight pipe, 230 second elbow bend, 240 electric end manual regulating valve front pipeline, 250 electric end manual regulating valve, 260 electric end manual regulating valve rear straight pipe, 270 first 90-degree elbow bend, 300 second 90-degree elbow bend, 310 valve end straight pipe, 320 third elbow bend, 330 valve end manual regulating valve front pipeline, 340 valve end manual regulating valve, 350 valve end manual regulating valve lower pipeline, 360 rear pipeline shrinkage, 370 fourth elbow bend, 380 second corrugated pipe, 400 electric regulating end merging pipeline, 410 electric end manual regulating valve straight pipe rear tee joint, 420 fifth elbow bend, 430 electric regulating merging lower straight pipe, 440 equal-diameter tee joint, 500 output pipe, 510 spindle seal overflow pneumatic regulating valve, 520 spindle seal overflow pipeline, manual regulating valve, 530 spindle seal return steam main pipe pipeline, 540 spindle seal return steam main pipe pipeline, 230 second elbow bend, 240 electric end manual regulating valve front pipeline, 250 electric end manual regulating valve front pipeline, 260 electric end manual regulating valve rear pipeline, 340 electric regulating valve manual regulating, 600 flow meter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a technical scheme: a kind of high-pressure cylinder shaft seal gas leakage pipeline, is used for keeping the gas temperature and pressure in the whole process, reduce heat and air current loss of the unit, recycle the gas leaked out, has improved the thermal efficiency of the steam turbine, please refer to fig. 1, including motor end vapor seal baffle 100, corrugated pipe 200, second 90 degrees of elbows 300, electricity adjust end merge pipeline 400 and output pipe 500;

referring to fig. 1 again, the motor-end vapor seal baffle 100 has a motor-end vapor seal baffle 100, specifically, the right side end of the motor-end vapor seal baffle 100 is fixedly provided with a valve-adjusting end vapor seal baffle 110, the motor-end vapor seal baffle 100 is used for fixedly mounting a corrugated pipe 200 and a second 90-degree elbow 300, and the motor-end vapor seal baffle 100 is made of stainless steel;

referring to fig. 1 again, the bellows 200 has a pipeline 210, a bellows rear straight pipe 220, a second elbow bend 230, an electric end manual adjustment valve front pipeline 240, an electric end manual adjustment valve 250, an electric end manual adjustment valve rear straight pipe 260, and a first 90 ° elbow 270, the bellows 200 is installed on the left side wall of the motor end vapor seal barrier 100, specifically, the top end of the bellows 200 is integrally formed with the pipeline 210, the top end of the pipeline 210 is integrally formed with the first 90 ° elbow 270, the other end of the first 90 ° elbow 270 is integrally formed with the bellows rear straight pipe 220, the left end of the bellows rear straight pipe 220 is integrally formed with the second elbow bend 230, the other end of the second elbow bend 230 is integrally formed with the electric end manual adjustment valve front pipeline 240, the bottom end of the electric end manual adjustment valve front pipeline 240 has the electric end manual adjustment valve 250 through a flange, the bottom of the electric end manual adjustment valve 250 has the electric end manual adjustment valve rear straight pipe 260 through, the corrugated pipe 200 is used for fixedly mounting the electric regulation end merging pipeline 400, the electric end manual regulating valve 250 is a switch channel for regulating flow, and the corrugated pipe 200 is made of a steel pipe;

referring to fig. 2, the second 90-degree elbow 300 has a straight pipe 310 at the valve adjusting end, a third elbow 320, a front pipe 330 at the valve adjusting end for manual adjustment, a manual adjustment valve 340 at the valve adjusting end, a lower pipe 350 at the valve adjusting end for manual adjustment, a rear pipe contraction 360, a fourth elbow 370 and a second bellows 380, the second 90-degree elbow 300 is installed on the right side wall of the steam sealing baffle 110 at the valve adjusting end, specifically, the right side wall of the steam sealing baffle 110 at the valve adjusting end is screwed with the second bellows 380 through a flange, the top of the second bellows 380 is connected with the second 90-degree elbow 300 through a flange, the straight pipe 310 at the valve adjusting end is integrally formed at the other end of the straight pipe 310 at the valve adjusting end, the third elbow 320 at the bottom end is integrally formed with the front pipe 330 at the valve adjusting end for manual adjustment, the front pipe 330 at the valve adjusting end for manual adjustment has the manual adjustment valve 340 at the bottom through a flange, the bottom of the valve adjusting end manual adjusting valve 340 is provided with a valve adjusting end manual adjusting valve lower pipeline 350 through a flange, a rear pipeline shrinkage 360 is integrally formed at the bottom end of the valve adjusting end manual adjusting valve lower pipeline 350, a fourth right-angle elbow 370 is arranged at the bottom of the rear pipeline shrinkage 360 through a flange, a second 90-degree elbow 300 is used for fixedly mounting the electric adjusting end merging pipeline 400, the valve adjusting end manual adjusting valve 340 is a switching channel for adjusting flow, and the second 90-degree elbow 300 is made of steel pipes;

referring to fig. 1 and 2 again, the electric tilt end combining pipeline 400 has an electric-end manual-adjustment-valve straight-tube rear tee 410, a fifth quarter bend 420, an electric-tilt-sum downward-bending straight tube 430 and an equal-diameter tee 440, the electric-tilt end combining pipeline 400 is installed at the bottom of the corrugated tube 200 and the second 90-degree bend 300, specifically, the left end of the electric-tilt-end combining pipeline 400 is integrally formed with the fifth quarter bend 420, the bottom end of the fifth quarter bend 420 is integrally formed with the electric-tilt-sum downward-bending straight tube 430, the bottom end of the electric-tilt-sum downward-bending straight tube 430 is provided with the equal-diameter tee 440 through a flange, the fourth quarter bend 370 is integrally formed with the electric-tilt-end combining pipeline 400, the bottom end of the electric-end manual-adjustment-valve rear straight tube 260 is provided with the electric-end manual-adjustment-valve straight-tube rear tee 410 through a flange, the bottom of the electric, the electrically tunable end merging pipe 400 is made of a steel pipe;

referring to fig. 1 again, the output pipe 500 has a spindle seal overflow pneumatic control valve 510, a spindle seal overflow pipeline 520, a manual control valve 530 and a spindle seal steam return main pipe pipeline 540, the output pipe 500 is installed on the electric tuning end merging pipeline 400, specifically, the front and rear side walls of the output pipe 500 are respectively flanged with the manual control valve 530 and the spindle seal overflow pneumatic control valve 510, and the rear side wall of the spindle seal overflow pneumatic control valve 510; a spindle seal overflow pipeline 520 is arranged on a flange, a spindle seal steam return main pipeline 540 is arranged on the front side wall of a manual regulating valve 530 through the flange, the spindle seal overflow pneumatic regulating valve 510 and the manual regulating valve 530 are both switch channels for regulating flow, the spindle seal steam return main pipeline 540 is connected with the overflow pipeline by using a butt welding branch pipe seat, the spindle seal overflow pipeline 520 is connected with a gas condensation pipeline by using a butt welding branch pipe seat, and an output pipe 500 is made of a steel pipe;

in the concrete use, when the utility model is needed, the steam flows through the corrugated pipe 200 on the motor end steam seal baffle 100 of the left side wall to flow to the pipeline 210, then to the corrugated pipe rear straight pipe 220, flows to the electric end manual regulating valve front pipeline 240 to the electric end manual regulating valve rear straight pipe 260 through the second elbow bend 230 in the use process, and simultaneously flows to the regulating valve end straight pipe 310 through the second 90-degree elbow 300 on the regulating valve end steam seal baffle 110, then to the third elbow bend 320, and the regulating valve end goes to the manual regulating valve front pipeline 330, and then flows to the regulating valve end manual regulating valve lower pipeline 350, and flows to the electric regulating end merging pipeline 400 through the fourth elbow bend 370, so that two streams of steam are gathered together, effective and accurate statistics are carried out on the quantity of the steam through the flowmeter 600 on the left side of the electric regulating end merging pipeline 400, and then flows to the electric regulating and gathering lower straight pipe 430 through the fifth elbow bend 420, and then to the front and back both ends of output pipe 500, flow to overflow pipeline and gas condensation pipeline respectively, realize reducing the heat and the air current loss of unit, the gas cyclic utilization that will spill has improved the thermal efficiency of steam turbine.

Referring to fig. 1 again, in order to know the amount of the airflow passing through the electrical regulation end combining pipeline 400 in time, a flow meter 600 is fixedly installed on the electrical regulation end combining pipeline 400, specifically, the flow meter 600 is screwed on the left side of the electrical regulation end combining pipeline 400 through a flange, a battery is installed inside the flow meter 600, and the flow meter 600 is a battery-powered vortex shedding flow meter.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A high-pressure cylinder shaft seal gas leakage pipeline is characterized in that: including motor end vapor seal baffle (100), bellows (200), second 90 elbow (300), electricity accent end amalgamation pipeline (400) and output tube (500), the right side end fixed mounting of motor end vapor seal baffle (100) transfers valve end vapor seal baffle (110), the left side wall fixed mounting of transferring valve end vapor seal baffle (110) bellows (200), the top integrated into one piece of bellows (200) has pipeline (210), the top integrated into one piece of pipeline (210) has first 90 elbow (270), the other end integrated into one piece of first 90 elbow (270) has straight tube (220) behind the bellows, the left side end integrated into one piece of straight tube (220) behind the bellows has second elbow bend (230), the other end integrated into one piece of second elbow bend (230) has electric end manual control valve front tube way (240), the bottom fixed mounting of electric end manual control valve front tube way (240) has electric end manual control valve (250), the bottom of electricity end manual regulation valve (250) is fixedly provided with an electricity end manual regulation valve rear straight pipe (260), the bottom of the electricity end manual regulation valve rear straight pipe (260) is fixedly provided with an electricity end manual regulation valve straight pipe rear tee joint (410), the bottom of the electricity end manual regulation valve straight pipe rear tee joint (410) is fixedly provided with an electricity end merging pipeline (400), the right side wall of the adjusting valve end steam seal baffle (110) is fixedly provided with a second corrugated pipe (380), the top of the second corrugated pipe (380) is fixedly provided with a second 90-degree elbow (300), the other end of the second 90-degree elbow (300) is integrally formed with an adjusting valve end straight pipe (310), the other end of the adjusting valve end straight pipe (310) is integrally formed with a third right-angled elbow (320), the bottom of the third right-angled elbow (320) is integrally formed with an adjusting valve end manual regulation valve front pipeline (330), the bottom of the manual adjusting valve front pipeline (330) is fixedly provided with a manual adjusting valve end adjusting valve (340), the bottom of the manual adjusting valve end adjusting valve (340) is fixedly provided with a manual adjusting valve end adjusting valve lower pipeline (350), the bottom of the manual adjusting valve end adjusting valve lower pipeline (350) is fixedly provided with a rear pipeline shrinkage joint (360), the bottom of the rear pipeline shrinkage joint (360) is fixedly provided with a fourth elbow bend (370), the fourth elbow bend (370) is integrally formed with the electric adjusting end merging pipeline (400), the left end of the electric adjusting end merging pipeline (400) is integrally formed with a fifth elbow bend (420), the bottom of the fifth elbow bend (420) is integrally formed with an electric adjusting downward-bending straight pipe (430), the bottom of the electric adjusting downward-bending straight pipe (430) is fixedly provided with an equal-diameter tee joint (440), and the bottom of the equal-diameter tee joint (500) is fixedly provided with the output pipe (500), the front side wall and the rear side wall of the output pipe (500) are respectively and fixedly provided with a manual regulating valve (530) and a spindle seal overflow pneumatic regulating valve (510), the rear side wall of the spindle seal overflow pneumatic regulating valve (510) is fixedly provided with a spindle seal overflow pipeline (520), and the front side wall of the manual regulating valve (530) is fixedly provided with a spindle seal steam return main pipe pipeline (540).

2. A high-pressure cylinder shaft seal leakage line as defined in claim 1, wherein: the left side fixed mounting that the end merges pipeline is transferred to electricity (400) has flowmeter (600), the inside of flowmeter (600) embeds there is the battery.

3. A high-pressure cylinder shaft seal leakage line as defined in claim 1, wherein: the shaft seal steam return main pipe pipeline (540) is fixedly installed with the overflow pipeline, and the shaft seal overflow pipeline (520) is fixedly installed with the gas condensation pipeline.

4. A high-pressure cylinder shaft seal leakage line as defined in claim 1, wherein: the electric end manual regulating valve (250), the valve end manual regulating valve (340), the shaft-connecting seal overflow pneumatic regulating valve (510) and the manual regulating valve (530) are all switch channels for regulating flow.